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authorHarpreet2016-09-03 00:34:27 +0530
committerHarpreet2016-09-03 00:34:27 +0530
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+// (C) Copyright International Business Machines Corporation 2007
+// All Rights Reserved.
+// This code is published under the Eclipse Public License.
+//
+// Authors :
+// Pierre Bonami, International Business Machines Corporation
+//
+// Date : 04/12/2007
+
+#ifndef BabSetupBase_H
+#define BabSetupBase_H
+
+#include <string>
+#include <list>
+#include "CglCutGenerator.hpp"
+#include "CbcHeuristic.hpp"
+#include "OsiChooseVariable.hpp"
+#include "BonOsiTMINLPInterface.hpp"
+#include "IpSmartPtr.hpp"
+#include "BonTMINLP2OsiLP.hpp"
+
+namespace Bonmin
+{
+ /** A class to have all elements necessary to setup a branch-and-bound.*/
+ class BabSetupBase
+ {
+ public:
+ /** Type for cut generation method with its frequency and string identification. */
+ struct CuttingMethod
+ {
+ int frequency;
+ std::string id;
+ CglCutGenerator * cgl;
+ bool atSolution;
+ bool normal;
+ bool always;
+ CuttingMethod():
+ atSolution(false),
+ normal(true),
+ always(false)
+ {}
+
+ CuttingMethod(const CuttingMethod & other):
+ frequency(other.frequency),
+ id(other.id),
+ cgl(other.cgl),
+ atSolution(other.atSolution),
+ normal(other.normal),
+ always(other.always)
+ {}
+ };
+ /** Type for heuristic method with its string identification. */
+ struct HeuristicMethod
+ {
+ std::string id;
+ CbcHeuristic* heuristic;
+ HeuristicMethod()
+ {}
+
+ HeuristicMethod(const HeuristicMethod & other):
+ id(other.id),
+ heuristic(other.heuristic)
+ {}
+ };
+ typedef std::list<CuttingMethod> CuttingMethods;
+ typedef std::list<HeuristicMethod > HeuristicMethods;
+
+ /** Strategies for comparing the nodes on the heap. */
+ enum NodeComparison {
+ bestBound = 0 /** Best bound*/,
+ DFS /** Depth First Search*/,
+ BFS /** Best First Search */,
+ dynamic /** Dynamic strategy, see <a href="http://www.coin-or.org/Doxygen/Cbc/class_cbc_branch_dynamic_decision.html">
+ CbcBranchActual.hpp </a> for explanations.*/,
+ bestGuess /** Best guessed integer solution is subtree below, based on pseudo costs */
+ };
+
+ /** Strategies for traversing the tree.*/
+ enum TreeTraversal {
+ HeapOnly=0 /** Only using the heap, uses CbcTree.*/,
+ DiveFromBest /** dive from top node of the heap untill it gets to a leaf of the tree. Uses Bonmin::CbcDiver.*/,
+ ProbedDive /** Eplore two kids before following on dive.*/,
+ DfsDiveFromBest /** dive from top node of the heap with more elaborate strategy (see options doc). Uses Bonmin::CbcDfsDiver.*/,
+ DfsDiveDynamic /** Same as DfsDiveFromBest, but after a prescribed number of integer solution are found switch to best-bound and if too many node switches to depth-first. Uses Bonmin::CbcDfsDiver.*/
+ };
+
+
+ /** @name Enums for optionslist parameters */
+ enum VarSelectStra_Enum {
+ MOST_FRACTIONAL=0,
+ STRONG_BRANCHING,
+ RELIABILITY_BRANCHING,
+#ifdef BONMIN_CURVATURE_BRANCHING
+ CURVATURE_ESTIMATOR,
+#endif
+ QP_STRONG_BRANCHING,
+ LP_STRONG_BRANCHING,
+ NLP_STRONG_BRANCHING,
+ OSI_SIMPLE,
+ OSI_STRONG,
+ RANDOM
+ };
+
+ /** Parameters represented by an integer. */
+ enum IntParameter{
+ BabLogLevel = 0 /** Log level of main branch-and-bound*/,
+ BabLogInterval/** Display information every logIntervval nodes.*/,
+ MaxFailures /** Max number of failures in a branch.*/,
+ FailureBehavior /** Behavior of the algorithm in the case of a failure.*/,
+ MaxInfeasible /** Max number of consecutive infeasible problem in a branch
+ before fathoming.*/,
+ NumberStrong /** Number of candidates for strong branching.*/,
+ MinReliability /** Minimum reliability before trust pseudo-costs.*/,
+ MaxNodes /** Global node limit.*/,
+ MaxSolutions /** limit on number of integer feasible solution.*/,
+ MaxIterations /** Global iteration limit. */,
+ SpecialOption /** Spetial option in particular for Cbc. */,
+ DisableSos /** Consider or not SOS constraints.*/,
+ NumCutPasses/** Number of cut passes at nodes.*/,
+ NumCutPassesAtRoot/** Number of cut passes at nodes.*/,
+ RootLogLevel/** Log level for root relaxation.*/,
+ NumberIntParam /** Dummy end to size table*/
+ };
+
+
+ /** Parameters represented by a double.*/
+ enum DoubleParameter{
+ CutoffDecr = 0 /** Amount by which cutoff is incremented */,
+ Cutoff /** cutoff value */,
+ AllowableGap /** Stop if absolute gap is less than this. */,
+ AllowableFractionGap /** Stop if relative gap is less than this.*/,
+ IntTol /** Integer tolerance.*/,
+ MaxTime /** Global time limit. */,
+ NumberDoubleParam /** Dummy end to size table*/
+ };
+
+ /** Default constructor. */
+ BabSetupBase(const CoinMessageHandler * handler = NULL);
+
+ /** Construct from existing tminlp. */
+ BabSetupBase(Ipopt::SmartPtr<TMINLP> tminlp, const CoinMessageHandler * handler = NULL);
+ /** Construct from existing application.*/
+ BabSetupBase(Ipopt::SmartPtr<TNLPSolver> app);
+ /** Construct from existing TMINLP interface.*/
+ BabSetupBase(const OsiTMINLPInterface& nlp);
+ /** Copy but uses an other nlp.*/
+ BabSetupBase(const BabSetupBase &setup,
+ OsiTMINLPInterface &nlp);
+
+ /** Copy but uses an other nlp.*/
+ BabSetupBase(const BabSetupBase &setup,
+ OsiTMINLPInterface &nlp,
+ const std::string &prefix);
+
+ /** Copy constructor. */
+ BabSetupBase(const BabSetupBase & other);
+
+ /** virtual copy constructor. */
+ virtual BabSetupBase * clone() const = 0;
+
+ /** Make a copy with solver replace by one passed .*/
+ virtual BabSetupBase *clone(OsiTMINLPInterface&nlp)const;
+ /** Virtual destructor. */
+ virtual ~BabSetupBase();
+
+ /** @name Methods to initialize algorithm with various inputs. */
+ /** @{ */
+ /** use existing TMINLP interface (containing the options).*/
+ void use(const OsiTMINLPInterface& nlp);
+ /** Read options (if not done before) and create interface using tminlp.*/
+ void use(Ipopt::SmartPtr<TMINLP> tminlp );
+ /** use specific instanciation of a TMINLP2TNLP.*/
+ void use(Ipopt::SmartPtr<TMINLP2TNLP> prob);
+ /** Set the non-linear solver used */
+ void setNonlinearSolver(OsiTMINLPInterface * s)
+ {
+ nonlinearSolver_ = s;
+ }
+ /** @} */
+
+ /** @name Methods to manipulate options. */
+ /** @{ */
+ /** Register all the options for this algorithm instance.*/
+ virtual void registerOptions();
+ /** Setup the defaults options for this algorithm. */
+ virtual void setBabDefaultOptions(Ipopt::SmartPtr<Bonmin::RegisteredOptions> roptions)
+ {}
+ /** Register all the options for this algorithm instance.*/
+ static void registerAllOptions(Ipopt::SmartPtr<Bonmin::RegisteredOptions> roptions);
+
+ /** Get the options from default text file (bonmin.opt) if don't already have them.*/
+ virtual void readOptionsFile()
+ {
+ if (readOptions_) return;
+ readOptionsFile("bonmin.opt");
+ }
+
+ /** Get the options from given fileName */
+ void readOptionsFile(std::string fileName);
+
+ /** Get the options from long string containing all.*/
+ void readOptionsString(std::string opt_string);
+
+ /** Get the options from stream.*/
+ void readOptionsStream(std::istream& is);
+
+ /** May print documentation of options if options print_options_documentation is set to yes.*/
+ void mayPrintDoc();
+
+
+ /** Get prefix to use for options.*/
+ const char * prefix() const {
+ return prefix_.c_str();
+ }
+
+ /** Set the value for options, output...*/
+ void setOptionsAndJournalist(Ipopt::SmartPtr<Bonmin::RegisteredOptions> roptions,
+ Ipopt::SmartPtr<Ipopt::OptionsList> options,
+ Ipopt::SmartPtr<Ipopt::Journalist> journalist)
+ {
+ options_ = options;
+ roptions_ = roptions;
+ journalist_ = journalist;
+ }
+
+ /** Initialize the options and the journalist.*/
+ void initializeOptionsAndJournalist();
+ /** @} */
+
+ /** @name Elements of the branch-and-bound setup.*/
+ /** @{ */
+ /** Pointer to the non-linear solver used.*/
+ OsiTMINLPInterface * nonlinearSolver()
+ {
+ return nonlinearSolver_;
+ }
+ /** Pointer to the continuous solver to use for relaxations. */
+ OsiSolverInterface * continuousSolver()
+ {
+ return continuousSolver_;
+ }
+ /** list of cutting planes methods to apply with their frequencies. */
+ CuttingMethods& cutGenerators()
+ {
+ return cutGenerators_;
+ }
+ /** list of Heuristic methods to use. */
+ HeuristicMethods& heuristics()
+ {
+ return heuristics_;
+ }
+ /** branching method to use. */
+ OsiChooseVariable * branchingMethod()
+ {
+ return branchingMethod_;
+ }
+ /** Method used to compare nodes. */
+ NodeComparison& nodeComparisonMethod()
+ {
+ return nodeComparisonMethod_;
+ }
+ /** Method used to traverse tree.*/
+ TreeTraversal treeTraversalMethod()
+ {
+ return treeTraversalMethod_;
+ }
+ /** Return value of integer parameter. */
+ int getIntParameter(const IntParameter &p) const
+ {
+ return intParam_[p];
+ }
+ /** Return value of double parameter.*/
+ double getDoubleParameter(const DoubleParameter &p) const
+ {
+ return doubleParam_[p];
+ }
+ /** Return value of integer parameter. */
+ void setIntParameter(const IntParameter &p, const int v)
+ {
+ intParam_[p] = v;
+ }
+ /** Return value of double parameter.*/
+ void setDoubleParameter(const DoubleParameter &p, const double v)
+ {
+ doubleParam_[p] = v;
+ }
+ /** @} */
+
+ /** Get the values of base parameters from the options stored.*/
+ void gatherParametersValues()
+ {
+ gatherParametersValues(options_);
+ }
+ /** Get the values of the base parameters from the passed options.*/
+ void gatherParametersValues(Ipopt::SmartPtr<Ipopt::OptionsList> options);
+ /** Acces storage of Journalist for output */
+ Ipopt::SmartPtr<Ipopt::Journalist> journalist()
+ {
+ return journalist_;
+ }
+
+ /** Acces list of Options */
+ Ipopt::SmartPtr<Ipopt::OptionsList> options()
+ {
+ return options_;
+ }
+
+ /** Access registered Options */
+ Ipopt::SmartPtr<Bonmin::RegisteredOptions> roptions()
+ {
+ return roptions_;
+ }
+
+ /** Access to extra objects.*/
+ const vector<OsiObject *>& objects() const
+ {
+ return objects_;
+ }
+
+ /** Access to extra objects.*/
+ vector<OsiObject *>& objects()
+ {
+ return objects_;
+ }
+
+ void addCutGenerator(CuttingMethod & cg){
+ cutGenerators_.push_back(cg);
+ }
+
+ void set_linearizer(TMINLP2OsiLP * linearizer){
+ linearizer_ = linearizer;
+ }
+
+ protected:
+ /** Set the priorities into OsiTMINLPInterface when needed.*/
+ void setPriorities();
+ /** Add SOS constraints to OsiTMINLPInterface when needed.*/
+ void addSos();
+
+ /** storage of integer parameters.*/
+ int intParam_[NumberIntParam];
+ /** default values for int parameters.*/
+ static int defaultIntParam_[NumberIntParam];
+ /** storage of double parameters. */
+ double doubleParam_[NumberDoubleParam];
+ /** default values for double parameters. */
+ static double defaultDoubleParam_[NumberDoubleParam];
+ /** Storage of the non-linear solver used.*/
+ OsiTMINLPInterface * nonlinearSolver_;
+ /** Storage of continuous solver.*/
+ OsiSolverInterface * continuousSolver_;
+ /** Method to linearize MINLPs */
+ Ipopt::SmartPtr<TMINLP2OsiLP> linearizer_;
+ /** Cut generation methods. */
+ CuttingMethods cutGenerators_;
+ /** Heuristic methods. */
+ HeuristicMethods heuristics_;
+ /** Branching method.*/
+ OsiChooseVariable * branchingMethod_;
+ /** Node comparison method.*/
+ NodeComparison nodeComparisonMethod_;
+ /** Tree traversal method.*/
+ TreeTraversal treeTraversalMethod_;
+ /** Extra object to add to Cbc (not OsiObjects).*/
+ vector<OsiObject *> objects_;
+
+
+ /** Storage of Journalist for output */
+ Ipopt::SmartPtr<Ipopt::Journalist> journalist_;
+
+ /** List of Options */
+ Ipopt::SmartPtr<Ipopt::OptionsList> options_;
+
+ /** Registered Options */
+ Ipopt::SmartPtr<Bonmin::RegisteredOptions> roptions_;
+
+ /** flag to say if option file was read.*/
+ bool readOptions_;
+ /** separate message handler.*/
+ CoinMessageHandler * messageHandler_;
+ /** Prefix to use when reading options.*/
+ std::string prefix_;
+ };
+}/* End namespace Bonmin. */
+#endif
+